Cattai is bounded in the west by the Hawkesbury River and is traversed by Cattai Creek to its confluence with the river. Apart from the natural endowments of the area, one of the outstanding landmarks is the brick farmhouse known as Cad-Die, located at the junction of Cattai Creek and the Hawkesbury River. This Georgian house was built in 1821 by Thomas Arndell, with further additions being made in the 1860s. It is now listed on the Register of the National Estate.[3]